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#!/usr/bin/env python
#
# Public Domain 2014-2018 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# test_txn02.py
# Transactions: commits and rollbacks
#
import fnmatch, os, shutil, time
from suite_subprocess import suite_subprocess
from wtscenario import make_scenarios
import wttest
class test_txn02(wttest.WiredTigerTestCase, suite_subprocess):
logmax = "100K"
tablename = 'test_txn02'
uri = 'table:' + tablename
archive_list = ['true', 'false']
conn_list = ['reopen', 'stay_open']
sync_list = [
'(method=dsync,enabled)',
'(method=fsync,enabled)',
'(method=none,enabled)',
'(enabled=false)'
]
types = [
('row', dict(tabletype='row',
create_params = 'key_format=i,value_format=i')),
('var', dict(tabletype='var',
create_params = 'key_format=r,value_format=i')),
('fix', dict(tabletype='fix',
create_params = 'key_format=r,value_format=8t')),
]
op1s = [
('i4', dict(op1=('insert', 4))),
('r1', dict(op1=('remove', 1))),
('u10', dict(op1=('update', 10))),
]
op2s = [
('i6', dict(op2=('insert', 6))),
('r4', dict(op2=('remove', 4))),
('u4', dict(op2=('update', 4))),
]
op3s = [
('i12', dict(op3=('insert', 12))),
('r4', dict(op3=('remove', 4))),
('u4', dict(op3=('update', 4))),
]
op4s = [
('i14', dict(op4=('insert', 14))),
('r12', dict(op4=('remove', 12))),
('u12', dict(op4=('update', 12))),
]
txn1s = [('t1c', dict(txn1='commit')), ('t1r', dict(txn1='rollback'))]
txn2s = [('t2c', dict(txn2='commit')), ('t2r', dict(txn2='rollback'))]
txn3s = [('t3c', dict(txn3='commit')), ('t3r', dict(txn3='rollback'))]
txn4s = [('t4c', dict(txn4='commit')), ('t4r', dict(txn4='rollback'))]
# This test generates thousands of potential scenarios.
# For default runs, we'll use a small subset of them, for
# long runs (when --long is set) we'll set a much larger limit.
scenarios = make_scenarios(types,
op1s, txn1s, op2s, txn2s, op3s, txn3s, op4s, txn4s,
prune=20, prunelong=5000)
# Each check_log() call takes a second, so we don't call it for
# every scenario, we'll limit it to the value of checklog_calls.
checklog_calls = 100 if wttest.islongtest() else 2
checklog_mod = (len(scenarios) / checklog_calls + 1)
def conn_config(self):
# Cycle through the different transaction_sync values in a
# deterministic manner.
txn_sync = self.sync_list[
self.scenario_number % len(self.sync_list)]
#
# We don't want to run zero fill with only the same settings, such
# as archive or sync, which are an even number of options.
#
freq = 3
zerofill = 'false'
if self.scenario_number % freq == 0:
zerofill = 'true'
return 'log=(archive=false,enabled,file_max=%s),' % self.logmax + \
'log=(zero_fill=%s),' % zerofill + \
'transaction_sync="%s",' % txn_sync
# Check that a cursor (optionally started in a new transaction), sees the
# expected values.
def check(self, session, txn_config, expected):
if txn_config:
session.begin_transaction(txn_config)
c = session.open_cursor(self.uri, None)
actual = dict((k, v) for k, v in c if v != 0)
# Search for the expected items as well as iterating
for k, v in expected.iteritems():
self.assertEqual(c[k], v)
c.close()
if txn_config:
session.commit_transaction()
self.assertEqual(actual, expected)
# Check the state of the system with respect to the current cursor and
# different isolation levels.
def check_all(self, current, committed):
# Transactions see their own changes.
# Read-uncommitted transactions see all changes.
# Snapshot and read-committed transactions should not see changes.
self.check(self.session, None, current)
self.check(self.session2, "isolation=snapshot", committed)
self.check(self.session2, "isolation=read-committed", committed)
self.check(self.session2, "isolation=read-uncommitted", current)
# Opening a clone of the database home directory should run
# recovery and see the committed results. Flush the log because
# the backup may not get all the log records if we are running
# without a sync option. Use sync=off to force a write to the OS.
self.session.log_flush('sync=off')
self.backup(self.backup_dir)
backup_conn_params = 'log=(enabled,file_max=%s)' % self.logmax
backup_conn = self.wiredtiger_open(self.backup_dir, backup_conn_params)
try:
self.check(backup_conn.open_session(), None, committed)
finally:
backup_conn.close()
def check_log(self, committed):
self.backup(self.backup_dir)
#
# Open and close the backup connection a few times to force
# repeated recovery and log archiving even if later recoveries
# are essentially no-ops. Confirm that the backup contains
# the committed operations after recovery.
#
# Cycle through the different archive values in a
# deterministic manner.
self.archive = self.archive_list[
self.scenario_number % len(self.archive_list)]
backup_conn_params = \
'log=(enabled,file_max=%s,archive=%s)' % (self.logmax, self.archive)
orig_logs = fnmatch.filter(os.listdir(self.backup_dir), "*gerLog*")
endcount = 2
count = 0
while count < endcount:
backup_conn = self.wiredtiger_open(self.backup_dir,
backup_conn_params)
try:
session = backup_conn.open_session()
finally:
self.check(backup_conn.open_session(), None, committed)
# Sleep long enough so that the archive thread is guaranteed
# to run before we close the connection.
time.sleep(1.0)
backup_conn.close()
count += 1
#
# Check logs after repeated openings. The first log should
# have been archived if configured. Subsequent openings would not
# archive because no checkpoint is written due to no modifications.
#
cur_logs = fnmatch.filter(os.listdir(self.backup_dir), "*gerLog*")
for o in orig_logs:
if self.archive == 'true':
self.assertEqual(False, o in cur_logs)
else:
self.assertEqual(True, o in cur_logs)
#
# Run printlog and make sure it exits with zero status.
# Printlog should not run recovery nor advance the logs. Make sure
# it does not.
#
self.runWt(['-h', self.backup_dir, 'printlog'], outfilename='printlog.out')
pr_logs = fnmatch.filter(os.listdir(self.backup_dir), "*gerLog*")
self.assertEqual(cur_logs, pr_logs)
def test_ops(self):
self.backup_dir = os.path.join(self.home, "WT_BACKUP")
self.session2 = self.conn.open_session()
# print "Creating %s with config '%s'" % (self.uri, self.create_params)
self.session.create(self.uri, self.create_params)
# Set up the table with entries for 1, 2, 10 and 11.
# We use the overwrite config so insert can update as needed.
c = self.session.open_cursor(self.uri, None, 'overwrite')
c[1] = c[2] = c[10] = c[11] = 1
current = {1:1, 2:1, 10:1, 11:1}
committed = current.copy()
reopen = self.conn_list[
self.scenario_number % len(self.conn_list)]
ops = (self.op1, self.op2, self.op3, self.op4)
txns = (self.txn1, self.txn2, self.txn3, self.txn4)
# for ok, txn in zip(ops, txns):
# print ', '.join('%s(%d)[%s]' % (ok[0], ok[1], txn)
for i, ot in enumerate(zip(ops, txns)):
ok, txn = ot
op, k = ok
# Close and reopen the connection and cursor.
if reopen == 'reopen':
self.reopen_conn()
self.session2 = self.conn.open_session()
c = self.session.open_cursor(self.uri, None, 'overwrite')
self.session.begin_transaction(
(self.scenario_number % 2) and 'sync' or None)
# Test multiple operations per transaction by always
# doing the same operation on key k + 1.
k1 = k + 1
# print '%d: %s(%d)[%s]' % (i, ok[0], ok[1], txn)
if op == 'insert' or op == 'update':
c[k] = c[k1] = i + 2
current[k] = current[k1] = i + 2
elif op == 'remove':
c.set_key(k)
c.remove()
c.set_key(k1)
c.remove()
if k in current:
del current[k]
if k1 in current:
del current[k1]
# print current
# Check the state after each operation.
self.check_all(current, committed)
if txn == 'commit':
committed = current.copy()
self.session.commit_transaction()
elif txn == 'rollback':
current = committed.copy()
self.session.rollback_transaction()
# Check the state after each commit/rollback.
self.check_all(current, committed)
# check_log() is slow, we don't run it on every scenario.
if self.scenario_number % test_txn02.checklog_mod == 0:
self.check_log(committed)
if __name__ == '__main__':
wttest.run()
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